Your questions and suggestions are welcome. I hope this quick tip helped you to log out a user from SSH session in Linux. Don't worry, the worst case would be that you kick off yourself from your current session. You can identify which user to kick off from the timing of the log in which is visible in the output of the who command. In such case, you can close the session which should not be active anymore. You can kill the terminal and open another SSH session from a new terminal but now you see yourself logged into the system twice. This is the case when your SSH session hangs up for some reason like network disconnection. It won't kick the user from all the sessions. If the same user is logged in from more than one system or terminal, only the session that you are killing is impacted. sudo kill -9 32004 You can also log out a user from selected session if the user has more than one SSH session If the SIGHUP signal does not work, then send SIGKILL signal. Save your work!" | write prakash pts/2 Force kill a SSH session if SIGNHUP doesn't work You can use the write command to quickly drop a message to the user in this manner: echo "Your session will end in 2 minutes. It's a good idea to inform the end-user before you terminate his/her session. Send a message before terminating the session There are a few things you should know and do. The SSH session closes (and PuTTY with it) as soon as the command finishes. Of course, to perform such an action, you need to be either root or a sudo user. It also effectively disconnects all processes in the session from the controlling terminal. This signal is used to report that the user’s terminal is disconnected. To do that, you can use kill command to send a SIGHUP signal. If you kill the login shell session, the user will be disconnected. The process ID of its shell session is 32004. Now imagine that I want to kick use prakash from the SSH session. This option displays the process ID of the login shell session of the users. Log out a user from SSH sessionįirst, check the list of logged-in users to your Linux server. In this quick tip, I'll show you how you can kick any user off the system. But what if you want to log out some other user from the SSH connection? Please also see this article and this article.If you are logged into a remote Linux system via SSH, you just need to use the exit command to log out of SSH. The file nohup.out contained: Terminal close - query abortedįor some explanation on nohup and background processes please see this post. Without disown, the MySQL import could be aborted if you closed the Putty window (despite we used nohup).Īt least it was aborted for me. disown will disable sending the SIGHUP signal to all active jobs.& at the end of the line sends the command to the background.And sends all the stdout and stderr output to the file nohup.out (by default). nohup – prevents the process from receiving SIGHUP (Signal Hang UP) signal ( source).This way you can keep the session alive and can manually execute further commands. Please note, you have to follow both the steps as mentioned above. added /bin/bash at the end of commands in dummy.txt. You can кun the script mysql_import.sh in the background (instead of detaching a session) and close the Putty window: cd /var/www putty.exe -ssh 172.17.0.52 -l root -m dummy.txt -t. Other Solutions 2.1 Run the Process in the Background Please see this post for screen keyboard shortcuts.Ģ. To destroy a session, reattach the session, then press Ctrl A, then K, and then Y. Then you can reattach any session as: screen -r įor example, if the session ID is 1672, then you can reattach it as: screen -r 1672 Type "screen -r tty.host" to resume one of them.Īlso, if you have several detached sessions, you can list them (and their IDs) with: screen -ls There are screens on:ġ2204 ( 02:01:10 AM) (Detached)ġ2204 ( 02:00:17 AM) (Detached)ġ2204 ( 01:22:31 AM) (Detached) If there are several detached sessions, the output would be like this: There are several suitable screens on:ġ2204 ( 02:01:11 AM) (Detached)ġ2204 ( 02:00:18 AM) (Detached)ġ2204 ( 01:22:32 AM) (Detached) To reattach the detached session: screen -r Check that the process is still running: ps -aux | grep mysql_import Press Ctrl A and then D to detach the session.Īlso, please see this post on detaching sessions.Ħ.
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